大庆喇萨杏油田三次加密调整的实践与认识

Practices and understanding of the third infilling adjustment of La-Sa-Xing reservoirs in Daqing oilfield

大庆喇萨杏油田经过二次加密调整后 ,各种监测资料表明仍有部分油层动用差或未动用。这部分潜力油层薄、物性差、空间分布高度零散、与水淹油层关系复杂 ,依靠现有井网难以有效动用。“九五”以来开始了三次加密探索性试验和研究 ,先后开辟了 4个先导性试验区和 1个工业化生产试验区 ,研究和形成了三次加密调整配套技术。实践证明 ,三次加密调整是大庆油田水驱开发过程中的一项重大调整措施。为此 ,以三次加密矿场实践为依据 ,分析了三次加密调整的潜力和分布特征 ,提出了三次加密调整方法 ,指出了三次加密调整对改善区块整体开发效果的作用。

After the second infilling adjustment of La-Sa-Xing reservoirs in Daqing oilfield,all kinds of monitoring data showed that there had been still some poorer producing or unproducing pay zones in the reservoirs.These pay zones were thin, with poor property and scattered distribution in space and had complicated relationship with the watered out pay zones and using the existing well pattern they were difficult to produce oil.Thus,from the“ninth-five year plan”period,the third infilling adjustment test was opened up.There were four pilot test areas and a commercial test area and achieved very good result.Practices showed that the third infilling adjustment was a very important adjustment measure during water flooding development in Daqing oilfield.This paper,taking the third infilling adjustment as basis,analyzed the potential and distribution characteristics of the adjustment technique,putting forward the method of the technique,pointed out the development effect of improving whole block area in third infilling adjustment.